[jira] [Commented] (APLO-239) Aggregate connection-level messages (and bytes) metrics at connector and broker level

["Hiram Chirino (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/APLO-239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433318#comment-13433318 ] 

Hiram Chirino commented on APLO-239:
------------------------------------

Implemented and being deployed in build:
https://builds.apache.org/job/ActiveMQ-Apollo-Deploy/276/
                
> Aggregate connection-level messages (and bytes) metrics at connector and broker level
> -------------------------------------------------------------------------------------
>
>                 Key: APLO-239
>                 URL: https://issues.apache.org/jira/browse/APLO-239
>             Project: ActiveMQ Apollo
>          Issue Type: New Feature
>          Components: apollo-broker
>         Environment: apollo-99-trunk-20120810.034513-80
>            Reporter: Lionel Cons
>            Assignee: Hiram Chirino
>             Fix For: 1.5
>
>
> Apollo provides aggregated messages metrics via /broker/dest-metrics.
> There are for instance enqueue_item_counter and dequeue_item_counter that look like the total number of messages received and sent by the broker. Unfortunately, they represent something else. For instance, using a single topic and two consumers, one message received by the broker (and therefore two messages sent by the broker to the two consumers) will, in our environment, result in enqueue_item_counter+=3 and dequeue_item+=4 instead of the expected +1 and +2.
> This can be explained by looking at Apollo's internals. We use slow_consumer_policy=queue so Apollo will create two temporary queues attached to our two subscriptions. One message in (at topic level) will result into two messages out (topic -> queue) plus one message in and out of each queue. So the numbers seen are somehow consistent.
> For monitoring purposes, it is much more useful to get the number of messages in and out of the broker, considered as a black box. We do have these numbers at connection level (messages_received and messages_sent) but we miss aggregation. Would it be possible to have these counters aggregated at connector level? Of course, this should represent the number of messages ever seen by a connector, not only the ones from the existing connections.
> In addition, connections also have byte counters (read_counter and write_counter), it would be good to have these too aggregated at connector level.
> Finally, just like connection_counter at connector level is aggregated at broker level (via /broker), it would be nice to have these connector counters also aggregated at broker level. This way, messages_received under /broker would really represent the number of messages received by the broker...

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